Dynamically changing colors

[jdujava]

Checklist

• [X] I have read through the manual page (man fzf)
• [X] I have searched through the existing issues
• [ ] For bug reports, I have checked if the bug is reproducible in the latest version of fzf

Output of fzf --version

0.53.0 (c4a9ccd6)

OS

• [X] Linux
• [ ] macOS
• [ ] Windows
• [ ] Etc.

Shell

• [ ] bash
• [X] zsh
• [ ] fish

Problem / Steps to reproduce

Is there a way to dynamically change the colors? Reading through the documentation I was unable to find something along the lines of change-color action. Would it be difficult to implement?

Context: I would like to dynamically change the background color of a preview, depending on the type of preview I choose.

[jdujava]

More thorough description of my intended use case is in https://github.com/junegunn/fzf/issues/3862#issuecomment-2167953315.